Article ID Journal Published Year Pages File Type
451408 Computer Networks 2007 16 Pages PDF
Abstract

Of the various radio resource management functions, in this paper we focus on call admission control (CAC). We propose a CAC scheme for multiservice High Altitude Platform (HAP) wideband code division multiple access (W-CDMA) cellular systems that caters for multimedia services. HAPs have known increasing popularity during the past few years and are expected to play a pivotal role in the telecommunications arena by virtue of their appealing features. We first study the uplink capacity of a multiservice HAP W-CDMA cellular system taking into consideration power control imperfections and evaluate the degradation that a new call induces in the quality of service of ongoing calls. Based on the obtained statistics, we then develop a CAC scheme that takes account of power control imperfections and user mobility and compare it to a CAC scheme that is based on instantaneous energy per bit to noise power spectral density ratio (Eb/N0) measurements. Additionally, we examine these algorithms for two different criteria that apply to both new and handoff call requests. The first criterion is based on the minimum Eb/N0 of the first tier cells, while the second bases its decision upon the mean Eb/N0 of the cells of the first tier. Simulation studies further document and confirm the positive characteristics of the proposed CAC scheme.

Related Topics
Physical Sciences and Engineering Computer Science Computer Networks and Communications
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